Detection chain and electronic readout of the QUBIC instrument

The Q and U Bolometric Interferometer for Cosmology (QUBIC) Technical Demonstrator (TD) aiming to shows the feasibility of the combination of interferometry and bolometric detection. The electronic readout system is based on an array of 128 NbSi Transition Edge Sensors cooled at 350mK readout with 128 SQUIDs at 1K controlled and amplified by an Application Specific Integrated Circuit at 40K. This readout design allows a 128:1 Time Domain Multiplexing. We report the design and the performance of the detection chain in this paper. The technological demonstrator unwent a campaign of test in the lab. Evaluation of the QUBIC bolometers and readout electronics includes the measurement of I-V curves, time constant and the Noise Equivalent Power. Currently the mean Noise Equivalent Power is ~ 2 x 10⁻¹⁶ W/√Hz

Detection chain and electronic readout of the QUBIC instrument

The Q and U Bolometric Interferometer for Cosmology (QUBIC) Technical Demonstrator (TD) aiming to shows the feasibility of the combination of interferometry and bolometric detection. The electronic readout system is based on an array of 128 NbSi Transition Edge Sensors cooled at 350mK readout with 128 SQUIDs at 1K controlled and amplified by an Application Specific Integrated Circuit at 40K. This readout design allows a 128:1 Time Domain Multiplexing. We report the design and the performance of the detection chain in this paper. The technological demonstrator unwent a campaign of test in the lab. Evaluation of the QUBIC bolometers and readout electronics includes the measurement of I-V curves, time constant and the Noise Equivalent Power. Currently the mean Noise Equivalent Power is ~ 2 x 10⁻¹⁶ W/√Hz

Simulations and performance of the QUBIC optical beam combiner

QUBIC, the Q & U Bolometric Interferometer for Cosmology, is a novel ground-based instrument that aims to measure the extremely faint B-mode polarisation anisotropy of the cosmic microwave background at intermediate angular scales (multipoles o

Gersemi tests with the MCBRD Magnet at FREIA

This report gives an account of the cryogenic tests performed on the vertical cryostat Gersemi with the dipole magnet MCBRD connected to the magnet insert between the end of March and the beginning of May 2022

Measurements of the Kapitza resistance between Silicon and Helium from 0.4 K to 2.1 K

International audienceabstrac

Gersemi tests with Dummy Cavity in Liquid Insert (Run 1)

This report gives an account of the cryogenic tests performed on the vertical cryostat Gersemi with a dummy cavity connected to the liquid insert in October 2019

Gersemi tests with Dummy Cavity in Liquid Insert (Run 1)

This report gives an account of the cryogenic tests performed on the vertical cryostat Gersemi with a dummy cavity connected to the liquid insert in October 2019

Gersemi tests with Dummy Cavity in Liquid Insert (Run 2)

This report gives an account of the cryogenic tests performed on the vertical cryostat Gersemi with a dummy cavity connected to the liquid insert between the end of November and the beginning of December 2019

Gersemi tests with the MCBRD Magnet at FREIA

This report gives an account of the cryogenic tests performed on the vertical cryostat Gersemi with the dipole magnet MCBRD connected to the magnet insert between the end of March and the beginning of May 2022

HEAT TRANSFER ENHANCEMENT IN SPLIT AND RECOMBINE FLOW CONFIGURATIONS: A NUMERICAL AND EXPERIMENTAL STUDY

Heat transfer enhancement in laminar regime by split and recombine (SAR) mechanism, based on the baker\u27s transformation, is investigated. Two different heat exchangers, called SARI and SAR2, are studied. Their geometries are inspired from the previous studies reported in the literature. The working fluid on both, shell and tube side, is water and the temperature on the shell side is kept constant. Experiments are carried out for the Reynolds number range 1001000, and provides a less uniform temperature field at the outlet